Casting machine for stereotype plates



July 28, 1925.

C. WINKLER CASTING MACHINE FOR STEREOTYPE PLATES Filed March 21, 1925 WITNESSES ATTORNEYS Patented July 28, 1925.

UNITED STATES CARL WINKLER, 0F BERNE, SWITZERLAND.

CASTING MACHINE FOR STE REOTYPE PLATES.-

App-lication filed March 21, 1925. Serial N0. 17,320. i

To all whom it may concern:

Be it known that I, CARL WINKLER, a citizen of the Swiss Republic, residing at Berne, in the Swiss Republic, have invented new and useful Improvements in Casting Machines for Stereotype Plates, of which the following is a specification.

My invention relates to a casting machine for stereotype plates in which a cock is used for controlling the flow of metal.

It has been found that in such machines the best way of preventing the molten stereotype metal from entering into the bearing is to provide sufficient lubrication. Heretofore this lubrication was carried out in such a way that oil was forced into the bearing during the opening motion of the cock. This was not however sufficient to preventthe stereotype metal from penetrating into the bearing at higher temperatures. Acccording to the invention this drawback is overcome by forcing oil into the bearing both on-opening and on closing the cock.

One way of carrying out the invention is shown by way of example in the accompany ing drawing. v I Fig. 1 is a vertical section through the pump in a plane parallel to the axis of the cock,

Fig. 2 a vertical section'through the pump in a direction at right angles to the cock axis, and an end view of the receptacle for' the molten metal.

Fig. 3 shows the piping connecting the pump with the two bearings. I

The pump has two plungers a, I) which are connected with the opposite ends of a lever c fulcrumed at the middle. At their lower ends the plungers are hollow, in order to take up the suction valves d, and they each possess a hole 6 through which the oil in the receiver 7 passes to the suction valves. To theforce chamber g are connected one or more force pipes h which are closed at the top by force valves i, in order to prevent the oil from returning to the force chamber during the suction stroke of the plungers. The lever c is connected eccentrically with the cock is in the bottom of the receptacle 0 by means of the link Z.

If, now, the cock is turned into the position shown in dotted lines in Fig. 2, the oil' collecting in thepressure chamber g under neath the piston b is pressed through one of the pipes h to the bearings m, a. As soon as the cock is closed again by returning into the position shown in full lines, the piston 12 is raised and the piston a lowered, so that oil is pressed by the latter into the bearing m, n. -It will be seen therefore that every movement of the cock is is accompanied by mechanical: lubrication.

What I claim and desire to secure by Letters Patent of the United States is: V I

Casting machine for stereotype plates comprising a pot to melt the stereotype metal, acock to regulate the flow of metal from said pot, and means to; lubricate said cock both in opening and closing, substantially as, and for the purpose, set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' CARL VVINKLER.

Witnesses: v HEB. HAMNER, FRED. SOHLEY.- 

